AI Composer

Written in Scala for the artificial intelligence class in my master's degree program at the University of Minnesota, Twin Cities.This project explores the potential for generating music using artificial intelligence. It generates notes via the musical technique of counterpoint to facilitate harmonically cohesive melodies. Two methods are exposed, one for generating a cantus firmus line and one for generating a first species for a given cantus firmus. Both methods adhere to a set of rules which dictate which notes can be chosen when.

Source Code

Installation

maven

    
<dependency>
    <groupId>com.bengangllipson</groupId>
    <artifactId>ai-composer_3</artifactId>
    <version>3.0.0</version>
</dependency>
    

gradle

sbt

Usage

import com.bengangllipson.aicomposer.api.AiComposer;

void main() {
    AiComposer aiComposer = new AiComposer();
    List <String> cantusFirmus = aiComposer.generateCantusFirmus();
    List <String> firstSpecies = aiComposer.generateFirstSpecies(cantusFirmus);
}

Dependencies

• Scala v3.8.2
• JDK 17+
• sbt

Cantus Firmus Rules

• Length must be 8-16 notes.
• First and last note must be the tonic.
• Final note must be approached by either a step above or a half step below.
• The leading tone must always progress to the tonic.
• All notes must be in the correct key.
• All note-to-note progressions must be melodic consonances.
• No note may be followed by the same note.
• The total range (interval between lowest and highest notes) must be no more than a tenth.
• There must be no more than 2 melodic motions larger a 4th or larger.
• Any large leaps (a 4th or larger) must be followed by stepwise motion in the opposite direction.
• There must be a single climax (high point) that appears only once in the line.
• Motives or licks must not be repeated.

First Species Rules

• Must be the same length as the cantus firmus.
• The first note must be either the tonic or the dominant.
• The last note must be the tonic.
• All notes must be in the correct key.
• All note-to-note progressions must be melodic consonances.
• There must be no leaps greater than an 8th.
• All vertical intervals between the cantus firmus and first species must be harmonic consonances.
• No note may be followed by the same note.
• The leading tone must always lead to the tonic.
• Any large leaps (a 4th or larger) must be followed by stepwise motion in the opposite direction.
• There must be no more than 2 leaps in a row.
• Consecutive leaps must not go in the same direction.
• There must be a single climax (high point) that appears only once in the line.
• Motives or licks must not be repeated.
• The line must not contain the same note more than 4 times.
• There must be no parallel 5ths.

Research Paper

The project includes a research paper discussing my implementation.

research-paper/